Texting this girl?

I've met a new girl who is pretty cool but yet weird. When ever we text I would usually compliment her and out of nowhere she would text lol. I would say stuff like you are smart and cool and she would reply oh wow or laughing out loud. I'm feeling like, she doesn't like me at all. It's just strange and causes me to text things that's completely weird and make myself look stupid, because she puts me in that situation. I don't know what that means?